Not surprisingly, the headliners are Lady Gaga, Soundgarden, Green Day, Arcade Fire, The Strokes and Phoenix.

Other notable acts that should draw a crowd include Erykah Badu, fresh off her naked stunt in Dallas, Chicago's Mavis Staples, MGMT and plenty of weed anthems from Cypress Hill.

Let the debate begin on whether this year's lineup is worthy of your dollar. Outspoken Lollapalooza-critic Jim DeRogatis called it "Chicago's musical Walmart on the Lake" and characterized the remaining lineup as an "Old Country Buffet-style smorgasbord of established indie-rock buzz bands."